Electrorheological Damper Ground Detection Circuit
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Solution Overview
Problem
The electrode of an electrorheological damper is at risk of being applied with high voltage when the cylinder is ungrounded, posing safety and operational risks.
Innovation Solution
A suspension control apparatus is designed with a voltage generating portion, a connecting portion, and a controller that includes an electrode connecting portion, a ground connecting portion, and a ground detection connecting portion to prevent high voltage application by discontinuing voltage generation when the ground detection connecting portion and ground are disconnected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the voltage generating portion generates voltage to the electrode, then the electrorheological fluid can be varied in properties for damping force adjustment, but the electrode may be applied with high voltage when the cylinder is ungrounded, causing safety risks
Solution Approach 1:
The ground detection connecting portion detects the ground connection status before the voltage generating portion generates voltage to the electrode. By performing this detection in advance, the system can determine whether it is safe to apply voltage, thereby preventing the harmful effect of high voltage application when ungrounded while still enabling damping force adjustment when properly grounded
Solution Approach 2:
The ground detection connecting portion acts as an intermediary between the voltage generating portion and the ground. It monitors the ground connection status and provides this information to the voltage generating portion, which uses it to control voltage generation. This intermediary mechanism enables safe voltage application by mediating between the need for voltage generation and the safety requirement of proper grounding
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively prevents the electrode of the electrorheological damper from being applied with high voltage while the cylinder is ungrounded, ensuring safety and reliable operation.
Implementation Method 1
an electrorheological fluid that is varied in properties by electric field, the electrorheological damper being configured to adjust a damping force along with voltage application
Data Source
AI summary
A voltage converter of a high voltage driver generates a high voltage applied to an electrorheological damper. The voltage converter and the electrorheological damper are electrically connected together through a connecting portion. The connecting portion comprises an electrode pin that connects the voltage converter and an electrode cylinder of the electrorheological damper; a ground pin that connects an external cylinder of the electrorheological damper and ground, and a ground detection pin disposed separately from the ground pin and connected to the ground through the external cylinder and the ground pin. When the ground detection pin and the ground are disconnected, the voltage converter discontinues the voltage generation with or without a command (control signal) of a sub-controller.